mapbox/cumulative-timer: A simple cumulative timer for benchmarking JavaScript applications. · GitHub

A simple cumulative timer for benchmarking. Similar to console.time & console.timeEnd, but accumulates time for a particular id over many calls.

var timer = require('cumulative-timer');

timer.start('total');

timer.start('foo'); /* ... */ timer.stop('foo');
timer.start('bar'); /* ... */ timer.stop('bar');
timer.start('foo'); /* ... */ timer.stop('foo');

timer.stop('total');

timer.log();

Produces the following output:

 700ms 100.00% total
 204ms  29.14% foo
 496ms  70.86% bar

Note that the total timer id has a special treatment — it's used for the percentage calculation on the log. If there's no such id, the output will be just milliseconds.

For raw JSON of accumulated times, access timer.times.

The timer is global — you can require it from different files, and the acummulated time stats will be shared.

Should also work in browsers with Browserify.